symtab.c (symtab_node::reset_section): New method.

	* symtab.c (symtab_node::reset_section): New method.
	* cgraph.c (cgraph_node_cannot_be_local_p_1): Accept non-local
	for localization.
	* cgraph.h (reset_section): Declare.
	* ipa-inline-analysis.c (do_estimate_growth): Check for comdat groups;
	do not consider comdat locals.
	* cgraphclones.c (set_new_clone_decl_and_node_flags): Get section
	for new symbol.
	* ipa-visiblity.c (cgraph_externally_visible_p): Cleanup.
	(update_visibility_by_resolution_info): Consider UNDEF; fix checking;
	reset sections of symbols dragged out of the comdats.
	(function_and_variable_visibility): Reset sections of localized symbols.

From-SVN: r211600

1 files changed, 19 insertions, 14 deletions

diff --git a/gcc/ipa-visibility.c b/gcc/ipa-visibility.c
index 4e0fd9e..97f9a00 100644
--- a/gcc/ipa-visibility.c
+++ b/gcc/ipa-visibility.c
@@ -236,7 +236,7 @@ cgraph_externally_visible_p (struct cgraph_node *node,
     return true;
   if (node->resolution == LDPR_PREVAILING_DEF_IRONLY)
     return false;
-  /* When doing LTO or whole program, we can bring COMDAT functoins static.
+  /* When doing LTO or whole program, we can bring COMDAT functions static.
      This improves code quality and we know we will duplicate them at most twice
      (in the case that we are not using plugin and link with object file
       implementing same COMDAT)  */
@@ -295,8 +295,6 @@ varpool_externally_visible_p (varpool_node *vnode)
      Even if the linker clams the symbol is unused, never bring internal
      symbols that are declared by user as used or externally visible.
      This is needed for i.e. references from asm statements.   */
-  if (symtab_used_from_object_file_p (vnode))
-    return true;
   if (vnode->resolution == LDPR_PREVAILING_DEF_IRONLY)
     return false;
 
@@ -386,7 +384,8 @@ update_visibility_by_resolution_info (symtab_node * node)
 
   if (!node->externally_visible
       || (!DECL_WEAK (node->decl) && !DECL_ONE_ONLY (node->decl))
-      || node->resolution == LDPR_UNKNOWN)
+      || node->resolution == LDPR_UNKNOWN
+      || node->resolution == LDPR_UNDEF)
     return;
 
   define = (node->resolution == LDPR_PREVAILING_DEF_IRONLY
@@ -397,7 +396,7 @@ update_visibility_by_resolution_info (symtab_node * node)
   if (node->same_comdat_group)
     for (symtab_node *next = node->same_comdat_group;
 	 next != node; next = next->same_comdat_group)
-      gcc_assert (!node->externally_visible
+      gcc_assert (!next->externally_visible
 		  || define == (next->resolution == LDPR_PREVAILING_DEF_IRONLY
 			        || next->resolution == LDPR_PREVAILING_DEF
 			        || next->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP));
@@ -411,11 +410,15 @@ update_visibility_by_resolution_info (symtab_node * node)
 	if (next->externally_visible
 	    && !define)
 	  DECL_EXTERNAL (next->decl) = true;
+	if (!next->alias)
+	  next->reset_section ();
       }
   node->set_comdat_group (NULL);
   DECL_WEAK (node->decl) = false;
   if (!define)
     DECL_EXTERNAL (node->decl) = true;
+  if (!node->alias)
+    node->reset_section ();
   symtab_dissolve_same_comdat_group_list (node);
 }
 
@@ -476,7 +479,7 @@ function_and_variable_visibility (bool whole_program)
 	  symtab_dissolve_same_comdat_group_list (node);
 	}
       gcc_assert ((!DECL_WEAK (node->decl)
-		  && !DECL_COMDAT (node->decl))
+		   && !DECL_COMDAT (node->decl))
       	          || TREE_PUBLIC (node->decl)
 		  || node->weakref
 		  || DECL_EXTERNAL (node->decl));
@@ -494,6 +497,7 @@ function_and_variable_visibility (bool whole_program)
 	  && node->definition && !node->weakref
 	  && !DECL_EXTERNAL (node->decl))
 	{
+	  bool reset = TREE_PUBLIC (node->decl);
 	  gcc_assert (whole_program || in_lto_p
 		      || !TREE_PUBLIC (node->decl));
 	  node->unique_name = ((node->resolution == LDPR_PREVAILING_DEF_IRONLY
@@ -512,9 +516,9 @@ function_and_variable_visibility (bool whole_program)
 		     next = next->same_comdat_group)
 		{
 		  next->set_comdat_group (NULL);
-		  if (!next->alias)
-		    next->set_section (NULL);
 		  symtab_make_decl_local (next->decl);
+		  if (!node->alias)
+		    node->reset_section ();
 		  next->unique_name = ((next->resolution == LDPR_PREVAILING_DEF_IRONLY
 					|| next->unique_name
 					|| next->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP)
@@ -528,9 +532,9 @@ function_and_variable_visibility (bool whole_program)
 	    }
 	  if (TREE_PUBLIC (node->decl))
 	    node->set_comdat_group (NULL);
-	  if (DECL_COMDAT (node->decl) && !node->alias)
-	    node->set_section (NULL);
 	  symtab_make_decl_local (node->decl);
+	  if (reset && !node->alias)
+	    node->reset_section ();
 	}
 
       if (node->thunk.thunk_p
@@ -632,6 +636,7 @@ function_and_variable_visibility (bool whole_program)
       if (!vnode->externally_visible
 	  && !vnode->weakref)
 	{
+	  bool reset = TREE_PUBLIC (vnode->decl);
 	  gcc_assert (in_lto_p || whole_program || !TREE_PUBLIC (vnode->decl));
 	  vnode->unique_name = ((vnode->resolution == LDPR_PREVAILING_DEF_IRONLY
 				       || vnode->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP)
@@ -647,9 +652,9 @@ function_and_variable_visibility (bool whole_program)
 		     next = next->same_comdat_group)
 		{
 		  next->set_comdat_group (NULL);
-		  if (!next->alias)
-		    next->set_section (NULL);
 		  symtab_make_decl_local (next->decl);
+		  if (!next->alias)
+		    next->reset_section ();
 		  next->unique_name = ((next->resolution == LDPR_PREVAILING_DEF_IRONLY
 					|| next->unique_name
 					|| next->resolution == LDPR_PREVAILING_DEF_IRONLY_EXP)
@@ -659,9 +664,9 @@ function_and_variable_visibility (bool whole_program)
 	    }
 	  if (TREE_PUBLIC (vnode->decl))
 	    vnode->set_comdat_group (NULL);
-	  if (DECL_COMDAT (vnode->decl) && !vnode->alias)
-	    vnode->set_section (NULL);
 	  symtab_make_decl_local (vnode->decl);
+	  if (reset && !vnode->alias)
+	    vnode->reset_section ();
 	  vnode->resolution = LDPR_PREVAILING_DEF_IRONLY;
 	}
       update_visibility_by_resolution_info (vnode);